\documentclass{article}
\usepackage{amssymb,amsmath,amscd,concmath}
\pagestyle{empty}
\begin{document}
\begin{equation*}
p = \sum_(y=3000BC)^2005AD y^6 + 135.5y^4 + 83270y^2 + 53
\end{equation*}
\end{document}
